diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_ctanhl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_ctanhl.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_ctanhl.c b/sysdeps/ieee754/ldbl-128ibm/s_ctanhl.c deleted file mode 100644 index 96bdccd9f8..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/s_ctanhl.c +++ /dev/null @@ -1,121 +0,0 @@ -/* Complex hyperbole tangent for long double. IBM extended format version. - Copyright (C) 1997-2015 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <complex.h> -#include <fenv.h> -#include <float.h> -#include <math.h> -#include <math_ldbl_opt.h> - -#include <math_private.h> - -/* IBM long double GCC builtin sets LDBL_EPSILON == LDBL_DENORM_MIN */ -static const long double ldbl_eps = 0x1p-106L; - -__complex__ long double -__ctanhl (__complex__ long double x) -{ - __complex__ long double res; - - if (!isfinite (__real__ x) || !isfinite (__imag__ x)) - { - if (isinf (__real__ x)) - { - __real__ res = __copysignl (1.0L, __real__ x); - __imag__ res = __copysignl (0.0L, __imag__ x); - } - else if (__imag__ x == 0.0) - { - res = x; - } - else - { - __real__ res = __nanl (""); - __imag__ res = __nanl (""); - -#ifdef FE_INVALID - if (isinf (__imag__ x)) - feraiseexcept (FE_INVALID); -#endif - } - } - else - { - long double sinix, cosix; - long double den; - const int t = (int) ((LDBL_MAX_EXP - 1) * M_LN2l / 2.0L); - - /* tanh(x+iy) = (sinh(2x) + i*sin(2y))/(cosh(2x) + cos(2y)) - = (sinh(x)*cosh(x) + i*sin(y)*cos(y))/(sinh(x)^2 + cos(y)^2). */ - - __sincosl (__imag__ x, &sinix, &cosix); - - if (fabsl (__real__ x) > t) - { - /* Avoid intermediate overflow when the imaginary part of - the result may be subnormal. Ignoring negligible terms, - the real part is +/- 1, the imaginary part is - sin(y)*cos(y)/sinh(x)^2 = 4*sin(y)*cos(y)/exp(2x). */ - long double exp_2t = __ieee754_expl (2 * t); - __real__ res = __copysignl (1.0L, __real__ x); - __imag__ res = 4 * sinix * cosix; - __real__ x = fabsl (__real__ x); - __real__ x -= t; - __imag__ res /= exp_2t; - if (__real__ x > t) - { - /* Underflow (original real part of x has absolute value - > 2t). */ - __imag__ res /= exp_2t; - } - else - __imag__ res /= __ieee754_expl (2.0L * __real__ x); - } - else - { - long double sinhrx, coshrx; - if (fabs (__real__ x) > LDBL_MIN) - { - sinhrx = __ieee754_sinhl (__real__ x); - coshrx = __ieee754_coshl (__real__ x); - } - else - { - sinhrx = __real__ x; - coshrx = 1.0L; - } - - if (fabsl (sinhrx) > fabsl (cosix) * ldbl_eps) - den = sinhrx * sinhrx + cosix * cosix; - else - den = cosix * cosix; - __real__ res = sinhrx * (coshrx / den); - __imag__ res = sinix * (cosix / den); - } - /* __gcc_qmul does not respect -0.0 so we need the following fixup. */ - if ((__real__ res == 0.0L) && (__real__ x == 0.0L)) - __real__ res = __real__ x; - - if ((__real__ res == 0.0L) && (__imag__ x == 0.0L)) - __imag__ res = __imag__ x; - } - - return res; -} -long_double_symbol (libm, __ctanhl, ctanhl); |